Morgan driver's fault 100%
No idea from that video what the visibility to the left was like but there is clearly enougfh room to wait at the central reservation, if there was any doubt about a gap being available which the Morgan driver either did not see properly, misjudged the gap, or I'm afarid his attempt at showing the Morgan was quick off a gravel surface on lock was a complete fail.
Dangerous driving/driving without due care and attention notice coming his way - looks like the police were nearby - maybe monitoring the event anyway.